Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and Cash Equivalents	$ 420	$ 379
Accounts Receivable, net of allowances in 2013 and 2012, respectively	1,457	1,069
Tax Receivable	226	227
Unbilled Revenues	265	314
Fuel	318	583
Materials and Supplies, net	436	422
Prepayments	87	283
Derivative Contracts	77	138
Deferred Income Taxes	38	49
Regulatory Assets	282	349
Other	50	56
Total Current Assets	3,656	3,869
PROPERTY, PLANT AND EQUIPMENT	27,932	27,402
Less: Accumulated Depreciation and Amortization	(7,807)	(7,666)
Net Property, Plant and Equipment	20,125	19,736
NONCURRENT ASSETS
Regulatory Assets, Noncurrent	3,643	3,830
Regulatory Assets of Variable Interest Entities (VIEs)	658	713
Long-Term Investments	1,320	1,324
Nuclear Decommissioning Trust (NDT) Fund	1,602	1,540
Other Special Funds	202	191
Goodwill	16	16
Other Intangibles	37	34
Derivative Contracts	102	153
Restricted Cash of VIEs	22	23
Other	329	296
Total Noncurrent Assets	7,931	8,120
Total Assets	31,712	31,725
CURRENT LIABILITIES
Long-Term Debt Due Within One Year	876	1,026
Securitization Debt of VIEs Due Within One Year	229	226
Commercial Paper and Loans	165	263
Accounts Payable	1,078	1,304
Derivative Contracts	27	46
Accrued Interest	114	91
Accrued Taxes	92	17
Deferred Income Taxes	10	72
Clean Energy Program	92	153
Obligation to Return Cash Collateral	125	122
Regulatory Liabilities	120	67
Other	478	390
Total Current Liabilities	3,406	3,777
NONCURRENT LIABILITIES
Deferred Income Taxes and Investment Tax Credits (ITC)	6,604	6,542
Regulatory Liabilities	245	209
Regulatory Liabilities of VIEs	10	10
Asset Retirement Obligations	636	627
Other Postretirement Benefit (OPEB) Costs	1,270	1,285
Accrued Pension Costs	724	876
Environmental Costs	464	537
Derivative Contracts	123	122
Long-Term Accrued Taxes	160	164
Other	114	108
Total Noncurrent Liabilities	10,350	10,480
LONG-TERM DEBT
Long-Term Debt	6,542	6,148
Securitization Debt of VIEs	442	496
Project Level, Non-Recourse Debt	25	43
Total Long-Term Debt	7,009	6,687
STOCKHOLDER'S EQUITY
Common Stock	4,833	4,833
Treasury Stock, at cost, 2013-27,692,398 shares; 2012-27,664,188 shares	(612)	(607)
Retained Earnings	7,080	6,942
Accumulated Other Comprehensive Income	(355)	(388)
Total Common Stockholders' Equity	10,946	10,780
Noncontrolling Interest	1	1
Total Stockholder's Equity	10,947	10,781
Total Capitalization	17,956	17,468
TOTAL LIABILITIES AND CAPITALIZATION	31,712	31,725
Power [Member]
CURRENT ASSETS
Cash and Cash Equivalents	6	7
Accounts Receivable, net of allowances in 2013 and 2012, respectively	405	269
Accounts Receivable-Affiliated Companies, net	170	340
Short-Term Loan to Affiliate	748	574
Fuel	318	583
Materials and Supplies, net	313	307
Prepayments	11	17
Derivative Contracts	52	118
Deferred Income Taxes	28	0
Other	1	19
Total Current Assets	2,052	2,234
PROPERTY, PLANT AND EQUIPMENT	9,786	9,697
Less: Accumulated Depreciation and Amortization	(2,793)	(2,679)
Net Property, Plant and Equipment	6,993	7,018
NONCURRENT ASSETS
Nuclear Decommissioning Trust (NDT) Fund	1,602	1,540
Other Special Funds	38	36
Goodwill	16	16
Other Intangibles	38	34
Derivative Contracts	6	49
Other	120	105
Total Noncurrent Assets	1,820	1,780
Total Assets	10,865	11,032
CURRENT LIABILITIES
Long-Term Debt Due Within One Year	300	300
Accounts Payable	408	498
Derivative Contracts	27	46
Accrued Interest	41	26
Deferred Income Taxes	0	16
Other	96	81
Total Current Liabilities	872	967
NONCURRENT LIABILITIES
Deferred Income Taxes and Investment Tax Credits (ITC)	1,628	1,575
Asset Retirement Obligations	374	369
Other Postretirement Benefit (OPEB) Costs	224	221
Accrued Pension Costs	230	272
Derivative Contracts	14	15
Long-Term Accrued Taxes	38	50
Other	87	84
Total Noncurrent Liabilities	2,595	2,586
LONG-TERM DEBT
Total Long-Term Debt	2,040	2,040
STOCKHOLDER'S EQUITY
Contributed Capital	2,028	2,028
Basis Adjustment	(986)	(986)
Retained Earnings	4,612	4,725
Accumulated Other Comprehensive Income	(296)	(328)
Total Stockholder's Equity	5,358	5,439
TOTAL LIABILITIES AND CAPITALIZATION	10,865	11,032
PSE And G [Member]
CURRENT ASSETS
Cash and Cash Equivalents	61	116
Accounts Receivable, net of allowances in 2013 and 2012, respectively	1,032	783
Unbilled Revenues	265	314
Materials and Supplies, net	121	114
Prepayments	9	29
Derivative Contracts	10	5
Deferred Income Taxes	38	49
Regulatory Assets	282	349
Other	15	24
Total Current Assets	1,833	1,783
PROPERTY, PLANT AND EQUIPMENT	17,494	17,006
Less: Accumulated Depreciation and Amortization	(4,780)	(4,726)
Net Property, Plant and Equipment	12,714	12,280
NONCURRENT ASSETS
Regulatory Assets, Noncurrent	3,643	3,830
Regulatory Assets of Variable Interest Entities (VIEs)	658	713
Long-Term Investments	361	348
Other Special Funds	61	61
Derivative Contracts	59	62
Restricted Cash of VIEs	22	23
Other	137	123
Total Noncurrent Assets	4,941	5,160
Total Assets	19,488	19,223
CURRENT LIABILITIES
Long-Term Debt Due Within One Year	575	725
Securitization Debt of VIEs Due Within One Year	229	226
Commercial Paper and Loans	165	263
Accounts Payable	539	630
Accounts Payable-Affiliated Companies, net	89	73
Accrued Interest	73	65
Deferred Income Taxes	43	60
Clean Energy Program	92	153
Obligation to Return Cash Collateral	125	122
Regulatory Liabilities	120	67
Other	351	269
Total Current Liabilities	2,401	2,653
NONCURRENT LIABILITIES
Deferred Income Taxes and Investment Tax Credits (ITC)	4,249	4,223
Regulatory Liabilities	245	209
Regulatory Liabilities of VIEs	10	10
Asset Retirement Obligations	254	250
Other Postretirement Benefit (OPEB) Costs	992	1,011
Accrued Pension Costs	369	463
Environmental Costs	413	486
Derivative Contracts	109	107
Long-Term Accrued Taxes	39	32
Other	44	38
Total Noncurrent Liabilities	6,724	6,829
LONG-TERM DEBT
Long-Term Debt	4,467	4,070
Securitization Debt of VIEs	442	496
Total Long-Term Debt	4,909	4,566
STOCKHOLDER'S EQUITY
Common Stock	892	892
Contributed Capital	520	420
Basis Adjustment	986	986
Retained Earnings	3,054	2,875
Accumulated Other Comprehensive Income	2	2
Total Stockholder's Equity	5,454	5,175
Total Capitalization	10,363	9,741
TOTAL LIABILITIES AND CAPITALIZATION	$ 19,488	$ 19,223